5.13.1 release notes

This is a bugfix release, to have a clean slate before merging in the
Bootstrap facelift for 6.0.0. Details:
* Merged in [9428] from rjsparks@nostrum.com:
Properly mark (and test) older ballot comment and discuss text after a new
revision is submitted. Fixes bug #1656.
* Merged in [9426] from rcross@amsl.com:
Add several 'From' options for IAD user of announcement tool.
* Merged in [9375] from rjsparks@nostrum.com:
Put old style slides directly into archived. Migrate IETF92 materials to
match.
* Merged in [9351] from rjsparks@nostrum.com:
Removed sessonly, replacing the idea with a separate State. Add tests
checking how materials show on agenda views.
* Fixed style attributes which resulted in red text on red background for
some error messages
* Buildbot changes: Separated out the schedulers for trunk, personal/\*and
branch/\*. Corrected regex patterns which extract unittest details. Added
a first tentative email notifier. Added ForceSchedulers, in order to be
able to force builds.
* Changed all explicitly set HttpResponse content_types to specify charset.
Django sets charset if you don't specify a content_type; if you specify
one you also must add a charset specification (if you want one). Fixes
issue #1647.
* Fixed a typo in the sort key generation for the sort on ipr count in
document search results.
* Updated release data and mkrelease support, which calculates the
release coverage snapshot without invoking tests that developers won't
ordinarily be able to run on their laptops/work machines.
-- Henrik Levkowetz <henrik@levkowetz.com> 10 Apr 2015 13:44:05 +0000